terça-feira, 7 de agosto de 2012

//8º ano 7/8/12

a) (3x + y ) (3x – y) =
b) ( 1 – 5x) . (1 + 5x) =  
  c) (2x + 3y) . (2x – 3y) =
d) (7 – 6x) . ( 7 + 6x) =
e) (1 + 7x²) . ( 1 – 7x²) =
f) (3x² - 4 ) ( 3x² + 4) =
g) (3x² - y²) . ( 3x² + y²) =
h) (2m⁵ - 3)² = ( R:
i) (x – 5y³)² =
j) (1 - mx)² =
k) (2 - x⁵)² =
l) (-3x – 5)² =
m) (x³ - m³)² =
 

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